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Cdv of Major General Jacob Cox and his staff officers. Photograph taken by Cadwallader & Tappen of Marietta, Ohio. Wear as shown in the scan.I will be adding the identities of the other officers as I research them.

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Cox, Jacob D., major-general, was born in Montreal,
Canada, Oct. 27, 1828, spent his boyhood in New York, removed
with his parents to Ohio in 1846, and graduated at Oberlin
college in 1851. After leaving college he studied law, was
admitted to the bar in 1853, practiced in Warren, Ohio and was
from 1859 to 1861 member of the state senate. Holding a state
commission as brigadier-general of volunteers at the beginning
of the Civil war, he was active in raising troops, and on May
17, 1861, was commissioned brigadier-general of U. S. volunteers. He commanded an independent column in the West Virginia
campaign under McClellan from July to Sept., 1861, and under
Rosecrans from September to December of the same year. He com-
manded the district of the Kanawha almost continuously until
Aug., 1862, when he was ordered to Washington and assigned to
the Army of Virginia under Pope. He led the advance of the
right wing of McClellan's army at South mountain and opened the
battle, Sept. 14, 1862, assuming command of the 9th army corps
when Gen. Reno fell, and directing its movements in the battle
of Antietam three days later. For his services in this campaign he was commissioned major-general of volunteers, Oct. 6,
1862, and was ordered to West Virginia, where he drove back the
Confederates, and then commanded the district until April,
1863, when he was put in command of the district of Ohio, and
later of a division of the 23d army corps.

He served in the
Atlanta campaign and in the campaigns of Franklin and Nashville
under Gen. Thomas. For services at the battles of Franklin he
was restored to the rank of major-general of volunteers from
which he had been reduced by constitutional limitation, in
April, 1863, and was given permanent command of the 23d corps.
He was transferred with his corps to North Carolina, in Feb.,
1865, as part of Schofield's army, capturing Fort Anderson, the
cities of Wilmington and Kinston, then joining Sherman's army
at Goldsboro, and commanding the district of western North
Carolina at Greensboro after the surrender of Gen. Johnston.

He resigned from the service, Jan. 1, 1866, returned to Ohio,
and was governor of the state in 1866 and 1867. He was secretary of the Interior in President Grant's cabinet, 1869-70,
then resigned, and, returning to Ohio, was a representative
from the Toledo district in the 45th Congress, 1877-79. He was
also for several years president of the Wabash railroad. He
was elected dean of the Cincinnati law school in 1881, and was
president of the University of Cincinnati from 1884 to 1889.
He retired from the deanship of the law school in 1897, and
from active professional life, and died Aug. 4, 1900.
Source: The Union Army, vol. 8